There are FAQs out the wazoo, and Lulu's offices be closed for the weekend now.
See your other thread:
Reasons for revenue withholding may vary.
Are you a US taxpeyer or not?
Did you opt for e-payment or hard check (cheque)?
If not a US taxpayer or expat, does your country of residence have a tax reciporcity agreement with the US?
Regardless of where you're from, did you fill out the appropriate US tax forms (as Lulu is based in the US)?
If you want a more definite concrete answer you'll have to wait until Lulu's holiday office closing has ended.
Have a nice evening.
R.F.G. Cameron a.k.a. Sphinx
My work can be found at: