How do I know if I elected to deduct sales tax instead of state and local income taxes on my 2024 tax return?

Look at your 2024 federal tax return and find Schedule A. Is the small box beside Schedule A, Line 5a checked?

If it is, then you elected to deduct sales tax instead of state and local income taxes on your 2024 tax return, and you should answer Yes.

If Line 5a is NOT checked, then you didn't make the election to deduct sales tax, so you should answer No.