I would like to become self-employed also as an invoice program such as the billing comes in handy. To say the same: I have nothing to complain about in the program, but prefer a ZIP code because of the considerable Anschafffungspreises. Be accessed at the moment 111, which seems to me abundantly lot considering the fact that it is essentially is a document and data collection program. The accounting must make another. For my small business I need Thankfully no accounting. Anyways, the software is mature and has more applications than you need. Important for beginners are: >> Bill ledger >> Master data during order entry >> Access to MS Office >> Lexware eBilling 2013: electronic invoices with qualified, digital signature - free signatures >> Exchange data with accountant or financial accounting (DATEV interface) >> Access to the online franking service Internet brand "of the German Post AG * These functions I would first acquire. Of course fun also makes the design of forms. All in all: a carefully targeted product with slightly excessive price