I was taught differently. The following vowels I type, please assume they have tails - my keyboard has not been set up yet to type those Polish vowels. Anyway, I was taught by someone whom speaks Polish very well, grammatically. She said there is not such word as "te" (E with a tail). Accusative would be Ta Herbate (both the A at the end of TA and the E at the end of Herbate will have tails). It would never be Te Herbate (both Es at end of both words have tails). The word does not exist and I cannot find it in my dictionary, either. So, shouldn't "Te mysz" above be "Ta mysz" (both vowel endings have tails). In the meanwhile, can someone teach me how to adjust my keyboard so I can type the Polish vowels with tails? Many thanks.
Depending on whether your device is apple or android, there's different ways of adding keyboards.
For apple devices: Settings -> General -> Keyboard -> Keyboards -> Add New Keyboard
For andriod devices (I have a samsung phone): Settings (this might be in "Apps" in the bottom right) -> General Management -> Language and Input -> Samsung Keyboard (I'm assuming there'd be an equivalent for other phone makes) -> Languages and Types -> Add input languages
From there you scroll to the language(s) you want to add! You can change between keyboards by swiping left and right on the space key for android and press and hold the world icon/smiley face for apple. (Sorry if other devices have a different route, most of them should have a similar way of getting to languages at the very least.)
In speech it's so common that I don't think anyone will ever correct you and most people won't even notice it.
However, if you take an official (writing) test, the use of tą as an accusative form will most likely be marked wrong, that's why we don't accept it here (yet).