Increase sales margin to balance out AliExpress VAT?

I’ve been advised to go with at least a 30% sales margin on all of my products but after AliExpress’s tax is deducted my profit is down to basically 15%. How do people get around this? Should I increase the margin to 45% or is 30% advised with VAT in mind? (Dropshipping noob here so be easy on me please lol)