I have issue custome onepage checout, I want move some billing fields to step payment method. This is screen http://prntscr.com/7pqn63 . Please help me asap. Thanks!
Hi @tung bien,
What one step checkout is this? I'd recommend contacting extension developers in the first place - they should let you know (and either tell how to do this or inform that it's not possible, it happens).