Change FTP value with Train Now

Hi, mow i,m training with function "training now"and adaptive training…ìt’ so good because i have not time for a structured plan, when i have to change my ftp? After i have reached all items level 10?
Thx

You can do an FTP test anytime you feel your FTP may have changed. The common recommendation is to test once every 4 to 6 weeks.