Form 8606 Lines 16 and 18

My 1099R combines my two 2025 transactions: 1) a traditional IRA withdrawal, and 2) a traditional IRA to ROTH conversion (not a backdoor conversion).  This ROTH conversion had taxes withheld, leaving a reduced amount arriving in ROTH account.  My 1099R Boxes 1 and 2 are equal, as expected since both transactions above are taxable. 

 

A Form 8606 was generated showing the full amount of my ROTH conversion BEFORE tax withholding on both Lines 16 and 18, with no other Lines completed.  I have no after-tax contributions.  Is it correct that Lines 16 and 18 should show the gross ROTH conversion amount BEFORE tax withholding, or, should these 2 Lines show the net ROTH conversion amount AFTER my tax withholding?  Did I answer a TT interview question incorrectly? Thank you!