Thanks for your question - I am just curious if you were unable to see my response on your previous question
You are correct, you add the $1,200 to your basis. The Visa interest after the rental is in service will be on line 13 of your schedule E
You attach a sheet to explain other interest, if you have more than one source of interest
If Visa is the only source of your other interest, just put "Visa" on the line next to "other interest"
Did you have any further questions? If not, please let me know if I have provided you with excellent service today