Local sales have vat,
Exports by sea you no taxes only mss levy, by road no levy or taxes.
Below is how you can claim vat for exported products .
Process Certificate of origin /EACC /COMESA OR COO certificates fir your products.In this case your product is 100% locally manufactured.
Customs entries for exported products .
All customs releases to COE processing must acted upon .
Do your maths cost of raw materials ,labour ,power ,wages , expenses then deduct as per advised bt tax consultants ( nione kando for this )and you can claim vat refund
Remember you pin must be tax compliance.
Marketing advises .
Join chamber of commerce to expand your market horizon,markets expo na kadhalika.
Have structure within your organisation,website ,domain address na market extensively .Below last two suggestions
Ni hayo tu kwa sasa.