1099-R Annuity Question Confusion

Have TT Deluxe installed on Windows11. 

 

Entering 1099-R data, towards end of entry TT determines it needs to ask more questions. One of which is this one: 

Annuity Information:
For the years XXXX received these distributions, was the total amount shown in the form the amount you paid tax on?
Total amount taxable:  Yes   No
 
Which Box on the form is TT asking about?  Box 1 (Gross Distribution)? or Box 2a (Taxable Amount)? There are values in both. TT is not clear on what constitutes Total Amount.
 
Thanks!