Quick recap if you don’t want a link (steps 1 and 2 are only for totally new players).
In TD/A enter a player as a non-member.
Change the players’ ID in the tournament file from blanks to the new one obtained in step one.
Upload the tournament
Validate the tournament
Check the tournament membership box for the player paying a tournament membership fee
Validate the tournament again
Rate the tournament (assuming there were no remaining uncorrected errors)
If you forgot step 2 then you can change the ID after step 3 and continue on.
JTP (if available for a section) is almost the same except that in step 5 you instead check the JTP box for the section, and it can even be done prior to the first validation.