Relations between records in the same table

Hi, I have a table for Invoices, where the type of the invoice can be selected: Fee requester, Proforma invoice, Invoice, Modified invoice, Storno invoice.

The layout of these documents are the same, so the fields are:
- invoice type
- invoice ID
- invoice number
- seller
- amount of money
- currency
- etc.

The "workflow" of the invoicing in my country is the following:
- Fee requester (has a unique invoice number; not mandatory)
- Proforma invoice (has a unique invoice number; only mandatory, if a fee requester is paid)
- Invoice (has a unique invoice number; mandatory, if the Proforma invoice doesn't contain the full price of the purchase, e.g. when I prepay 50% of the goods)
- Modified invoice (has a unique invoice number; not mandatory)
- Storno invoice (has a unique invoice number; only mandatory if an invoice is needed to be reversed)

A use case:
I get a fee requester for the 50% of a purchase on monday, I make a redocord for it. I pay that on wednesday and receive on the same day the Proforma invoice about what I have paid, I make another record for that. Two weeks later I receive the goods and an Invoice about the full price deducted by the Proforma invoice's amount, I make a third record for that. I see that my company data is wrong on the Invoice, they send me a Modified invoice with the corrected company data, and I make a fourth record for that. When I open up the box it turns out that they didn't send me the product I actually wanted, and can't provide that, so the business fails -> they send me a Storno invoice, and I make another record for that (and send the wrong goods back).

What do I want to do?
- When I create a Proforma invoice, I want to connect that to its Fee requester's record to see the history. A Fee requester can be connected to one Proforma invoice and many Fee requester can be connected to one Proforma invoice.
- When I create an Invoice, I want to connect that to its Proforma invoice's record. Same relation as above.
- When I create a Storno invoice I want to connect that to its Invoice's record which is reversed. Also the same algorithm with the Modified invoice. 1:1 relation.

What do I want to see?
When I look at a record I want to see the predecessor and successor invoices and based on this I could make listings of expected Proforma invoices which I must receive within a certain period of time, or when I get a Storno invoice I want to see whether it was already paid based on a Fee requester or Invoice or not, so on.

My problem is that I cannot set up the correct relations for connecting/linking the Invoices together. It would be very handy If I could keep all these invoice types in one table, by the way child tables didn't help me neither when I tried.

Short story long, this is what I want to apply, but can't figure out how. Thanks in advance!