SEC. 2. APPLICATION OF MAILBOX RULE TO DOCUMENTS 
AND 
PAYMENTS 
ELECTRONICALLY 
SUB-
MITTED TO THE INTERNAL REVENUE SERV-
ICE. 
(a) IN GENERAL.—Section 7502(c) of the Internal 
Revenue Code of 1986 is amended— 
(1) in the heading, by inserting ‘‘AND PAY-
MENT’’ after ‘‘FILING’’, 
(2) in paragraph (2)— 
(A) in the heading, by striking ‘‘; ELEC-
TRONIC FILING’’, and 
(B) by striking ‘‘and electronic filing’’, and 
(3) by adding at the end the following: 
‘‘(3) ELECTRONIC FILING AND PAYMENT.— 
‘‘(A) IN GENERAL.—If any return, claim, 
statement, or other document required to be 
filed, or any payment required to be made, 
within a prescribed period or on or before a 
prescribed date under authority of any provision 
of the internal revenue laws is sent electroni-
cally by any person to the agency, officer, or of-
fice with which such return, claim, statement, 
or other document is required to be filed, or to 
which such payment is required to be made, the 
date on which such return, claim, statement, or 
other document, or payment, is sent electroni-
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cally by such person shall be deemed to be the 
date of delivery or the date of payment, as the 
case may be, regardless of the date on which 
the applicable agency, officer, or office receives 
or reviews such return, claim, statement, docu-
ment, or payment. 
‘‘(B) REGULATIONS.—Not later than De-
cember 31, 2025, the Secretary shall issue such 
regulations or other guidance as the Secretary 
determines necessary to carry out the purposes 
of this paragraph.’’. 
(b) EFFECTIVE DATE.—The amendments made by 
this section shall apply to any document or payment sent 
after December 31, 2025. 
SEC. 3. EXTENSION OF TIME FOR MAKING S CORPORATION 
ELECTIONS. 
(a) IN GENERAL.—Section 1362(b) of the Internal 
Revenue Code of 1986 is amended to read as follows: 
‘‘(b) WHEN MADE.— 
‘‘(1) IN
GENERAL.—An election under sub-
section (a) may be made by a small business cor-
poration for any taxable year not later than the due 
date for filing the return of the S corporation for 
such taxable year (including extensions). 
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‘‘(2) CERTAIN ELECTIONS TREATED AS MADE 
FOR NEXT TAXABLE YEAR.—If— 
‘‘(A) an election under subsection (a) is 
made for any taxable year within the period de-
scribed in paragraph (1), but 
‘‘(B) either— 
‘‘(i) on 1 or more days in such taxable 
year and before the day on which the elec-
tion was made the corporation did not 
meet the requirements of subsection (b) of 
section 1361, or 
‘‘(ii) 1 or more of the persons who 
held stock in the corporation during such 
taxable year and before the election was 
made did not consent to the election, 
then such election shall be treated as made for 
the following taxable year. 
‘‘(3) AUTHORITY TO TREAT LATE ELECTIONS, 
ETC., AS TIMELY.—If— 
‘‘(A) an election under subsection (a) is 
made for any taxable year after the date pre-
scribed by this subsection for making such elec-
tion for such taxable year or no such election is 
made for any taxable year, and 
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‘‘(B) the Secretary determines that there 
was reasonable cause for the failure to timely 
make such election, 
the Secretary may treat such an election as timely 
made for such taxable year. 
‘‘(4) ELECTION ON TIMELY FILED RETURNS.— 
Except as otherwise provided by the Secretary, an 
election under subsection (a) for any taxable year 
may be made on a timely filed return of the S cor-
poration for such taxable year. 
‘‘(5) SECRETARIAL AUTHORITY.—The Secretary 
may prescribe such regulations, rules, or other guid-
ance as may be necessary or appropriate for pur-
poses of applying this subsection.’’. 
(b) COORDINATION WITH CERTAIN OTHER PROVI-
SIONS.— 
(1) 
QUALIFIED
SUBCHAPTER
S
SUBSIDI-
ARIES.—Section 1361(b)(3)(B) of such Code is 
amended by adding at the end the following flush 
sentence: 
‘‘Rules similar to the rules of section 1362(b) 
shall apply with respect to any election under 
clause (ii).’’. 
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(2) QUALIFIED SUBCHAPTER S TRUSTS.—Sec-
tion 1361(d)(2) of such Code is amended by striking 
subparagraph (D). 
(c) REVOCATIONS.—Section 1362(d)(1) of such Code 
is amended— 
(1) by striking ‘‘subparagraph (D)’’ in subpara-
graph (C) and inserting ‘‘subparagraphs (D) and 
(E)’’, and 
(2) by adding at the end the following new sub-
paragraph: 
‘‘(E) AUTHORITY TO TREAT LATE REVOCA-
TIONS AS TIMELY.—If— 
‘‘(i) a revocation under subparagraph 
(A) is made for any taxable year after the 
date prescribed by this paragraph for mak-
ing such revocation for such taxable year 
or no such revocation is made for any tax-
able year, and 
‘‘(ii) the Secretary determines that 
there was reasonable cause for the failure 
to timely make such revocation, 
the Secretary may treat such a revocation as 
timely made for such taxable year.’’. 
(d) EFFECTIVE DATE.— 
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(1) IN
GENERAL.—Except as otherwise pro-
vided in this subsection, the amendments made by 
this section shall apply to elections for taxable years 
beginning after December 31, 2025. 
(2) REVOCATIONS.—The amendments made by 
subsection (c) shall apply to revocations made after 
the date of the enactment of this Act. 
SEC. 4. QUARTERLY INSTALLMENTS FOR ESTIMATED IN-
COME TAX PAYMENTS BY INDIVIDUAL. 
(a) IN GENERAL.—The table contained in section 
6654(c)(2) of the Internal Revenue Code of 1986 is 
amended— 
(1) by striking ‘‘June 15’’ and inserting ‘‘July 
15’’, and 
(2) by striking ‘‘September 15’’ and inserting 
‘‘October 15’’. 
(b) EFFECTIVE DATE.—The amendments made by 
this section shall apply to installments due in taxable years 
beginning after December 31, 2025. 
Æ 
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