H1B extension stamping

My H1B extension was approved last month. Also my family H4 visa also extension was approved. Now I am planning go India for stamping. I have one doubt while filling DS-160.

For H4 what number I have to fill in DS-160 ( MY H1B EAC number or MY H4 extension I-539 approval number)

It would be your H-1 EAC number and not H-4 number.