Do I need to amend tax return to add a 1099-S (and how?) ?

I neglected to add a 1099-S to my 2024 tax return.  The return was filed via TurboTax, has already been accepted, and I've received a small refund.  The 1099-S is for sale of unimproved land, originally bought around 2005.  I did NOT make any profit.  The IRS website states I don't need to amend my return... "if we:  Accept your return without certain forms or schedules or ask you to send them."  So apparently IRS accepted my return without the 1099-S, but I'm still unsure of this; maybe they'll ask for it later?  Can I file a paper amended return and mail it to IRS?  If I file an amended through TurboTax, they're requiring me to upgrade to Premium for $$$.  Thank you in advance for any advice.