For USDA seed import permit, I just have Annona seed from Mexico. You need to have the green and yellow label on the front of the package with the permit inside with a list on inventory. Raul mails it to the USDA office on the green and yellow label (Escondido for me). USDA will then forward package to your address on the permit after inspection at no additional cost.
Permit Info:
Articles(Plant Parts)
ANNONA SP
Countries of Origin
Costa Rica, Mexico
Plant Parts
Seed
Intended Use
Planting and Propagation