We converted $46,500 from several traditional IRAs. At the time of the conversion $12,900 of those funds were taken out by the brokerage company for taxes (amounts as shown on the 1099-R). On form 8606-T $33,600 is shown on lines 16 and 18 , which is the net amount actually converted after taxes. Line 4b 1040 SR shows $46,500 as the taxable amount converted. However, form 8606-T indicates that the amount in line 18 on 8606-T should be the same amount as on line 1040 SR line 4b. We answers all the crazy questions about conversion and taxes. Help.