@nightowl2
Lines 6 & 13 are pre-filled as per the actual CRA Schedule 15 form. As the FHSA just started in 2023, those numbers will be the same for everyone.
Line 8 is calculated - Line 6 minus Line 7, so if Boxes 32 & 34 on your T4FHSA are zero, then Line 8 will equal line 6 ($8000).
Line 10 is also calculated - Line 8 plus line 9, so if Box 36 on your T4FHSA is zero, then Line 10 will equal line 8.
