knd78

I am an employee of a LTD based in the UK, and I live in the UK, but recently became an owner of a LTD in Bulgaria. I am the only director an self-employed there. I was asked by the Bulgarian tax office to provide A1 certificate. So far I have found two forms : CA3837 - I get to a point where I need to provide self-employment dates for the UK and I am an employee, CA3837 - i need my employer to send me abroad and that's not the case. Is there any other forms ? I will be working online while living in the UK, so no travel is included.