The procedure to create a Fiscal Host depends on your starting point and your end goals. Click on the link that fits your case to get the appropriate instructions:
Open your user menu and click on the + (plus symbol) next to the My Organizations section.
Give it a name, a short description, add its website address and a few tags.
Once your Organization is created, go to Settings > Fiscal Hosting and click on Activate as Host.
You will then have access to all Fiscal host settings, such as whether you want to be open to applications from Collectives, your host fee, etc.
Don't forget to go to Receiving Money and activate a method for people to give money to your Collectives, either credit cards (via Stripe) and/or bank transfers.
This will be the page for the first project, group or budget you will be hosting. Open your user menu and click the + next to My Collectives.
When choosing what type of Collective you want to create, choose the For any community option.
To add a Fiscal Host, click on the Start accepting contributions button on your Collective page.
When asked who will hold your money, choose Our organization.
You can either choose to add an existing Organization as a Fiscal Host or create a new Organization for that purpose.
To receive financial contributions, you have to connect a Stripe account and/or add a bank account.
Click on Connect Stripe.
Create a Stripe account, or log into your existing account by clicking Sign in in the upper right corner.
Choose a currency and add your bank account details to accept payments by bank transfer.
Your Fiscal Host will now be active.