To claim a tax deduction for a donation of $250 or more, you generally need a contemporaneous written acknowledgment from the charity. “Contemporaneous” means you receive it by the date you file your return, or the extended due date of the return. If you made a donation in 2021 but don’t have a letter from the charity, request it from the organization and wait to file your 2021 return until you receive it. Additional rules apply to certain types of donations. Under COVID-19 relief laws, taxpayers who don’t itemize deductions can claim a federal income tax write-off of up to $300 of cash contributions to qualified charities for the 2021 tax year ($600 for married couples filing jointly).