Company: NMZ
Filing Date: 2025-11-18
Form Type: N-14 8C/A
Source: 0001999371-25-018025
Chunk: 235

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-11-18
Form: N-14 8C/A
Chunk 235
---
 number on the line provided. ___________________________________________________________________ |     |          |         |

<div align='center'>Important Notice Regarding the Availability of Proxy Materials for

Nuveen Pennsylvania Quality Municipal Income Fund,

Annual Meeting of Shareholders to be held on January 16, 2026.

The Joint Proxy Statement/Prospectus and this proxy
card are available at

https://www.nuveen.com/en-us/investments/proxy-information#closed-end-funds</div>

|                                                                                                                                                                                                                                                                                                                                                 | Authorized Signatures — This section must be completed for your vote to be counted.— Sign and Date Below |
| Note: Please sign exactly as your name(s) appear(s) on this proxy card, and date it. When shares are held jointly, each holder should sign. When signing as attorney, executor, guardian, administrator, trustee, officer of corporation or other entity or in another representative capacity, please give the full title under the signature. |                                                                                                          |

| Date (mm/dd/yyyy) — Please print date below |     | Signature 1 — Please keep signature within the box |     | Signature 2 — Please keep signature within the box |
| /  /                                        |     |                                                    |     |                                                    |

| Scanner bar code |

| xxxxxxxxxxxxxx | NQP 34776 | xxxxxxxx |

| PO Box 43131              
 Providence, RI 02940-3131 | EVERY VOTE IS IMPORTANT |                                         |
|                           |                         | SCAN                                    
 The QR code or visit                    
 www.proxy-direct.com                    
 to vote your shares                     |
|                           |                         | LIVE AGENT                              
 Call 1-866-585-5258 with any questions. 
 Specialists can assist with voting.     
 Available Monday-Friday                 
 from 9 a.m. – 11 p.m. and               
 Saturday 12 p.m. – 6 p.m. ET            |
|                           |                         | CALL                                    
 1-800-337-3503                          
 Follow the recorded instructions        
 available 24 hours                      |
|                           |                         | MAIL                                    
 Vote, sign and Mail in the              
 enclosed Business Reply Envelope        |
|                           |                         | VOTE IN PERSON                          
 Attend Shareholder Meeting              
 333 West Wacker Dr.                     
 Chicago, IL, 60606 on January 16, 2026  |

COMMON SHARES

THIS PROXY IS BEING SOLICITED BY THE BOARD OF TRUSTEES.
The undersigned shareholder(s) of Nuveen