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makes sense to me 

 

see the definition of a 'charitable carryover' ...it may be the reason for the 'force to itemize' option on Schedule A. 

 

https://turbotax.intuit.com/tax-tips/general/tax-terms-glossary/L2M1PfoYy

 

Charitable carryovers

Generally, your deduction for donations to charity in one year cannot exceed 50% of your adjusted gross income for that year (30% in the case of donations of appreciated assets and contributions to private foundations). You can carry over any excess for the following five tax years.  If you can't take your full charitable contribution deduction this year, TurboTax will automatically carry over the remainder to next year's return.

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