The Westminster government is continuing its tax offices closure plan, with the Public and Commercial Services Union (PCS) claiming that more jobs are under threat.A number of tax enquiry offices in NI are threatened with closure, as are offices across Great Britain. HMRC is also planning to cut 2'000 posts across the UK.PCS, who organised the walkout, have over 2,000 members in Northern Ireland.The union claims that years of successive job cuts have left the organisation unable to cope, with delays on telephone lines, huge backlogs of post and private debt collectors being used.All week walkouts have affected HM Revenue and Customs (HMRC) offices in England, Wales and Scotland. They coincided with the deadline for tax credit renewals and a key date for self-assessment taxation payments.This followed a week of rolling strikes by HMRC workers in June.PCS general secretary Mark Serwotka said: "HMRC plays an essential role in our economy and our society, collecting the taxes that fund the other public services we all rely on. But it is being systematically undermined by unnecessary and politically-motivated cuts."These strikes demonstrate we are serious about stopping these damaging cuts and making a positive case for proper investment in this crucial department."