HMRC online filing

CIS and VAT filing software

Gateway Solver Desktop submits CIS300 returns and subcontractor verifications. It has been HMRC-recognised since 2004. VAT Solver Pro submits Making Tax Digital VAT returns.

Gateway Solver Desktop, with CIS300 returns and subcontractor verifications

Current products

PAYE filing through Gateway Solver was retired for 2025/26.

Gateway Solver Desktop

CIS online filing

Gateway Solver Desktop

HMRC-recognised since 2004. CIS filing from a Windows desktop: CIS300 monthly returns and subcontractor tax treatment verifications, without logging into the Government Gateway by hand every time.

Licensed per company. Quote on request.

VAT Solver Pro

Making Tax Digital for VAT

VAT Solver Pro

Submit VAT returns under Making Tax Digital. List price £25 a month or £300 a year for up to ten companies, confirmed on the invoice.

£25 / month or £300 / year, up to 10 companies.

Selected systems

Healthcare, insurance, warehousing, and aviation. Past engagements, not a current client list.

All portfolio

Hardware Interface · Healthcare · Mission Critical

NHS – Diabetic Retinopathy

Operators who were not ophthalmologists could capture retinal images; remote specialists diagnosed them; the GP received a care plan. HL7v3 and SNOMED were how that message survived contact with the rest of the NHS.

Jewson warehouse

Hardware Interface · Mobile

Jewson – Warehouse Stock Control System

Price check, replenishment, goods receipt and on-device label printing on Windows CE 4.0, with a sync that did not assume the warehouse was online.

A few valued customers

Logos from company files. Historical relationships, not a current endorsement list.

JewsonGama AviationMilton Keynes CouncilOrangeTNTPaystreamRullionCBLMouchelStaffordshire County CouncilLeeds City CouncilCJ O'SheaLengardMatthew HomesDeeley ConstructionModebestParagon plcLE WestMinistry of DefenceBank of AmericaDurkanTSK Group

What customers said

“Thanks again for the great CIS Solver software, it has made such a difference to submitting our returns.”

Tony Feather, Accountant, Leeds City Council

“It’s wonderful! We have saved so much time in completing our tax returns. It is so easy to use — if there are problems they are worded so that you can understand the problem.”

Cathy Oakley, Finance Manager, Staffordshire County Council

“The team at Evolved Software are fantastic, not only is their technically ability first class but they’re enthusiastic and genuinely a pleasure to deal with. Our project was managed professionally, we were regularly informed of progress and the software was delivered ahead of schedule!”

Alex Victoras, IT Manager, Paystream