IRA withdrawal taxable amount should be 2310.00 (line 4b on n1040) Turbo Tax Home & Business posted it on line 4b as 4620.00 - why is it posted double the correct amount

Correctly entered my 1099-R listing distribution as 2310.00 and taxable amount as 2310.00  Tax form 1040 shows taxable amount as double the amount 4620.00 How do I correct this situation?