First of all I was primarily interested in Deskera for it's Accounting features and I realise that's just part of what it can do, that said for my purposes if it's not great at accounting there's no point to using it.
I'm sorry to say this is poor accounting software, yes it has a few integrations but accounting can get complex and finance systems need to help with that complexity, this system does not really help that much, it's rather labour intensive to use and somewhat a clunky UI, to be fair to Deskera that tends to be the case with Finance systems, things can only be simplified, optimized or beautified so much, but in the case of Deskera it's still quite a way short of what I expect.
For example poor ui and functionality, I found a complete lack of drill down capability, say I review a P&L and notice expenses are high and want to drill down into an expense account, click it right? Wrong nothing happens, to find out why i have to open a new screen, open the nominal ledger reports, find the account and then finally find the villain which is a rather large journal expense, i'm not sure what that expense is about so I click it right? Wrong that does nothing so to find out what that journal is about I need to open another screen for journals, find the journal and look at that. laborious, imagine if i needed to do that 20 times over on several accounts, don't get me started on foreign currency conversion.
There are hundred different types of things you need in accounting systems but tasks such as the above are everyday bread and butter, so if they aren't done well it's hard to make up for it in other areas because something you do frequently that should take minutes to get crystal clarity is a hassle and takes far more time than it should. I haven't bothered checking the rest of the software because of this, if it doesn't do basic things well I don't hold out much hope for the rest of it.
The nominal ledger report looks ok, bit basic at least for foreign currency transactions it has both source and base currency values but no running balances on base and no balances at all on source currency, pretty poor. Reporting in general looks weak, functionality generally poor, eg. recurring monthly invoices please for month end? No it can only do 30 days, so that would be #1 =31st jan, #2= 2nd march, 1st April - totally lame. Workflow efficiency? Forget it.
Accounting software is meant help with the considerable amount of time required to keep proper records and to understand the data, this does neither imho and it makes me wonder who on earth you used to as an accountant to advise on this.
There's a lot of work to do and to use this like it is for me is just not worth it, makes a somewhat time consuming and sometimes difficult job, more time consuming and more difficult than it needs to be and really doesn't bring much clarity to the data either.
barely fit for purpose and not nice to use.
Apologies if this seems harsh but that's how I see it.