Macros and TDEE - could someone help a newish girl out?

I am trying to figure out all my settings in terms of calories and macros.

I am 4'11" (on a good day) and 128 lbs, I do some light yoga, the 30 DS and some moderate cardio through out the week. I am a SAHM to two young kids and I have my activity level set as lightly active.

I over rode the standard 1200 cals that they gave me and have it set at 1300.

I have PCOS and Insulin Resistance so I have my macros set at 40/30/30 (C/P/F) but I am trying to stay around 100g for my carbs.

My BMR is around 1350 and my TDEE - 20% is 1676.

I have few questions:

Considering my "conditions" do you think that the 40/30/30 is a good setting?
And what should I set my calories? Leave it at 1300? Go to 1350? 1656?
If I set it to the TDEE do I not eat back my exercised calories?

Thank you so much!

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