Need help with accounting for Enkeltmannsforetak

I need someone to help me and my boyfriend with all the things that needs to be done in regards to næringsrapport, receipts, mva, tax, what expenses we can deduct etc. i had my own company for 5 years in Denmark, so i do know quite a lot myself already, but rules are different from country to country. So essentially what we need is guidance of how to do these things in Norway. i think there will be between 200-300 appendixes/receipts to deduct. And we have been looking into using Conta, but we are of course open to use any program that is recommended. We would like to know a price for this. And we need someone who speaks good English.