The operation in Blantyre is among others aimed at forcing Value Added Tax - VAT registered operators to clear outstanding penalties with the revenue collection body.
The action is following the elapse of three weeks ultimatum.
On Tuesday, MRA sealed premises of Wang Trading and Olympic Bakery.
Other businesses that that been closed for similar offence are IT Suppliers and Logistics, Tranic Trading, Hassan International, Indian Spice, Palace Bar and V.E Trading.
Meanwhile, Head of Corporate Affairs at MRA, Steve Kapoloma has since reiterated the Authority's stand that the law will continue to take it's course on people who are evading tax.