The Basic Personal Amounts line is for the first line on the TD1 form ONLY.  The Other Indexed Amount line is for (most of) the other lines.  If the employee is only claiming the Basic Personal Amount on their TD1 form, then you should only be filling in the Basic Personal Amounts line in Sage.  Otherwise, you are essentially double-claiming their tax credits, which will lead to a nasty surprise for them when they file their tax return!

Thank you for you clear answer.  In the same vein, if they indicate on their TD forms that they are claiming a spouse or dependent, where do I put that in their record?

Those are perfect examples of items to put in "Other indexed amount".

So you are saying I do not enter the total at the bottom of the TD form on the first line but actually break them out?

Exactly.