I have been [told](https://home.kpmg/xx/en/home/insights/2018/10/united-states-indirect-tax-guide.html), that an overseas company selling in USA need to collect consumption tax and pay it back to US. However, our company is going to charge our customers in Australian dollars. Thus, to lodge a tax report in US we [must](https://www.irs.gov/individuals/international-taxpayers/foreign-currency-and-currency-exchange-rates) convert AUD to USD. And we would need to use currency conversion rates set by federal reserve on a day of our report submission. Where can I request these rates?


I thought it would be Federal Reserve Web site [RSS](https://www.federalreserve.gov/feeds/h10_data.htm) or [CSV](https://www.federalreserve.gov/datadownload/Choose.aspx?rel=H10)


But the data are published weekly at 4:15 there.


What resource should I use for currency conversion rates?



How to calculate currency conversion for USA consumption tax (sales tax) reporting