Do I need to enter all of my donations even the total is beyond that I can deduct in 5 years

I am planning to donate a large sum of my securities in 2026 for a particular project.  As the total amount is beyond what I can deduct in next 5 years, do I need to enter all of these donation items or just enter that is sufficient for take all possible itemized deductions?

Another related question.  If it becomes necessary, can I enter the 2026 donation that I didn't enter in 2026 tax return in the later years' tax returns within the 5-year carry-over period?

Thanks!