I find it super easy for the normal deductions to use the tool the cantons provide. I have experience in Aargau and Zurich and with most standard situations (job(s), savings, stocks or ETFs and even real estate) the sofware works perfect.
I see not much point that ever user here lists his CHF 700 for the bike he needs or doesn’t need to commute to the bus stop. The only non-obvious deductions (and not being asked for in the wizard) in my declaration are 0.3% of my deposit value Kosten für die Verwaltung von Wertschriften des Privatvermögens
CHF 200 «Haustür- und Gassenspenden» under donations
But even these two have been discussed in this forum