What do companies in Sweden need to do to comply with the fiscalization requirements?

In general, those steps are:

1. Purchase a cash register and a control unit.
2. Register your cash register with the tax authority.
3. Record all sales.
4. Always offer a receipt.

These are the basic steps that every seller must take. Of course, more details are needed. Furthermore, the proper connection between the cash register and the control unit is required and is perhaps the most important aspect of fiscalization. Also, there are certain rules in terms of registration, because registration is required for both the cash register and the control unit device. All sales must be captured via cash registers, and issuing receipts to customers is a must.