Two more Boeing employees have been arrested on tax-evasion charges.

That makes 13 employees arrested this week after S.C. Department of Revenue investigators said they fraudulently claimed they were exempt from state taxes and didn’t file returns even though they knew they owed money.

Charles Allen Jr., 53, of NW 1st Street in Pembroke Pines, Fla., is accused of evading $13,056 in state income taxes for 2012 to 2014. He made $118,658 in 2014 and owed $5,716 in state taxes, according to the arrest warrant.

Kitt Johnson, 47, of Waverly Place Lane in North Charleston is accused of evading $11,173 in taxes for 2012 to 2014. He made $66,469 in 2014 and owed $3,455 in taxes, according to the warrant.

The two workers were arrested Wednesday morning on three charges each of willful attempt to evade or defeat tax. Each charge carries a $10,000 fine and/or up to five years in prison. Their bail was set at $15,000 each.

More Boeing workers who deliberately failed to pay taxes are expected to be arrested, according to the Revenue Department.

Boeing makes the 787 Dreamliner commercial plane at its North Charleston campus and employs 8,159 people at its South Carolina facilities. A spokeswoman said the company cooperated with the investigation and suspended the workers who were charged.

Generally, workers can only claim an exemption from state taxes if they were refunded all taxes that were withheld during the previous year and expect to owe no current taxes.

David Wren contributed to this story. Reach Dave Munday at 843-937-5553.